Test: Pollution Zones In River


5 Questions MCQ Test Environmental Engineering - Notes, Videos, MCQs & PPTs | Test: Pollution Zones In River


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QUESTION: 1

 The pollution zones in the river are divided into how many types?

Solution:

Explanation: There are 4 types of pollution zones in the river, namely zone of degradation, zone of active decomposition, zone of recovery and zone of clear water.

QUESTION: 2

 In which pollution zone of river, growth of algae reappear?

Solution:

Explanation: The growth of algae reappear in the zone of recovery.The growth of fungi decreases.

QUESTION: 3

 In which pollution zone of the river, the dissolved oxygen reduced to 0?

Solution:

Explanation: The dissolved oxygen, reduced to 0 in the zone of active decomposition. The water is highly polluted in this zone.

QUESTION: 4

 Which is the third zone of pollution in the river?

Solution:

Explanation: The zone of recovery is the third zone of pollution in the river where river tries to recover the polluted water through the self purification process.

QUESTION: 5

In which pollution zone of the river, water retains its original dissolved oxygen concentration?

Solution:

Explanation: The water retains its original dissolved oxygen concentration in the zone of clean water. It has a clear appearance.

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